Looking on the internet deeply has found these results:

he is on the way is the most popular phrase on the web.

he is on way 13,030,000 results on the web	he is on the way 1140,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
No, he is on his way. He is on his way to Las Vegas right now to pick up his regular shipment. In fact, I called him, and he is on his way here to pick me up. Towelie thinks he is on his way to the laundromat. And now he is on his way to find the Book. We're pretty sure that He is on the way somewhere. Just like the dragons and zombies in his novels, he is on his way. He is on the way down.	He says help is on the way, that he already has your location. And now he is on his way to the stars Maybe he is on your side, the way it all worked out. We're pretty sure that He is on the way somewhere. Towelie thinks he is on his way to the laundromat. The leg he's standing on is the way he's going to scram She asks you to give your attention to the fact that a Member of the European Parliament may not be arrested when he or she is on the way to or from meetings of the European Parliament. He is on the way down.

he is on way

13,030,000 results on the web

he is on the way

1140,000,000 results on the web

More popular!

He says help is on the way, that he already has your location.
And now he is on his way to the stars
Maybe he is on your side, the way it all worked out.
We're pretty sure that He is on the way somewhere.
Towelie thinks he is on his way to the laundromat.
The leg he's standing on is the way he's going to scram
She asks you to give your attention to the fact that a Member of the European Parliament may not be arrested when he or she is on the way to or from meetings of the European Parliament.
He is on the way down.